{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4037-2BB15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4037-2BB15","canonicalUrl":"https://aoctrl.com/siemens/3RW4037-2BB15","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4037-2BB15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4037-2BB15 soft starter, Size S2, 63 A rated current at 40 °C, 110-230 V DC control supply, integrated bypass, screw and snap-on mounting.","salesMarkdown":"The Siemens SIRIUS 3RW4037-2BB15 is a soft starter in the S2 frame size, rated 63 A at 40 °C with a 110-230 V DC control supply. It includes an integrated bypass contact system that removes the thyristors from the circuit once the motor is at full speed, reducing heat dissipation and extending the life of the power electronics. The unit mounts via screw or snap-on to a DIN rail, fitting a standard panel enclosure. The integrated bypass contact system means the thyristors only handle the start and stop ramps; during run, the bypass relay carries the full load current, so the soft starter runs cooler and the thyristors see less thermal cycling. This is standard on SIRIUS 3RW40 series and avoids the need for an external bypass contactor. The 3RW4037-2BB15 measures 55 mm wide, 160 mm high, and 170 mm deep — a compact S2 footprint that fits a standard 55 mm DIN-rail slot. Screw and snap-on mounting lets the panel builder clip it onto the rail or bolt it to a backplate. Clearance requirements: 60 mm above, 40 mm below, and 30 mm to the side for airflow and wiring access. Main power terminals accept screw-type connections: solid wire 2x (0.25-2.5 mm²) and stranded 2x (1.5-25 mm²). Auxiliary and control circuits use spring-loaded terminals, which speed up wiring and resist vibration loosening. The control supply is 110-230 V DC, so a separate DC power supply is needed — no direct AC tap.","metaTitle":"Siemens 3RW4037-2BB15 SIRIUS Soft Starter, 63 A","metaDescription":"Siemens SIRIUS 3RW4037-2BB15 soft starter rated 63 A at 40 °C, 110-230 V DC control supply, integrated bypass. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"170mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55mm","title":"3RW4037-2BB15","Height":"160mm","Upwards":"60mm","Stranded":"2x (1.5 ... 25 mm²)","Downwards":"40mm","Thyristors":"Yes","At The Side":"30mm","description":"SIRIUS soft starter S2 63 A, 37 kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC spring-type terminals","During Storage":"-40 ... +80°C","External Reset":"Yes","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw and snap-on mounting","Minimum Load [%]":"20%","Mounting Position":"With additional fan: With vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back Without additional fan: With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° t","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","Product Designation":"Soft starter","Wire Length Maximum":"300m","Derating Temperature":"40°C","Inside-Delta Circuit":"No","at 40 °C rated value":"63A","at 50 °C rated value":"58A","at 60 °C rated value":"53A","For Auxiliary Contacts":"2x (24 ... 14)","For Main Current Circuit":"screw-type terminals","Motor Overload Protection":"Yes","Using Both Clamping Points":"2x (16 ... 2)","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Size Of Engine Control Device":"S2","Using The Back Clamping Point":"16 ... 2","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"18 ... 2","control supply voltage 1 at DC":"110 ... 230V","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"red","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Component Motor Brake Output":"No","during storage according to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","reference code according to EN 61346-2":"Q","control supply voltage 1 at AC at 50 Hz":"110 ... 230V","control supply voltage 1 at AC at 60 Hz":"110 ... 230V","during operation according to IEC 60721":"3K6 (no formation of ice, no condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6","during transport according to IEC 60721":"2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Evaluation Of Thermistor Motor Protection":"No","at standard circuit at 40 °C rated value":"37kW","at standard circuit at 50 °C rated value":"50hp","number of CO contacts for auxiliary contacts":"1","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Control Supply Voltage Frequency 1 Rated Value":"50Hz","Control Supply Voltage Frequency 2 Rated Value":"60Hz","Installation Altitude At Height Above Sea Level":"5 000m","continuous operating current [% of Ie] at 40 °C":"115%","Operating Voltage At Standard Circuit Rated Value":"400 ... 600V","contact rating of auxiliary contacts according to UL":"B300 / R300","Relative Negative Tolerance Of The Operating Frequency":"-10%","Relative Positive Tolerance Of The Operating Frequency":"10%","relative negative tolerance of the control supply voltage at DC":"-15%","relative positive tolerance of the control supply voltage at DC":"10%","Relative Negative Tolerance Of The Control Supply Voltage Frequency":"-10%","Relative Positive Tolerance Of The Control Supply Voltage Frequency":"10%","Relative Negative Tolerance Of The Operating Voltage At Standard Circuit":"-15%","Relative Positive Tolerance Of The Operating Voltage At Standard Circuit":"10%","power loss [W] at operational current at 40 °C during operation typical":"12W","relative negative tolerance of the control supply voltage at AC at 50 Hz":"-15%","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-15%","relative positive tolerance of the control supply voltage at AC at 50 Hz":"10%","relative positive tolerance of the control supply voltage at AC at 60 Hz":"10%","Adjustable Motor Current For Motor Overload Protection Minimum Rated Value":"26A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5a89b19f360f369c574872bf2eda6225.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=221342&mlfb=3RW4037-2BB15"},"ai":{"faq":[{"question":"What control voltage does 3RW4037-2BB15 require?","answer":"The control supply voltage is 110-230 V DC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4037-2BB15","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RW4037-2BB15 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}